Looking for some assistance

The project is on testing for measles and how your antibody levels have to be greater than the cut off value in order for you to test positive.

Investigate the relationship between sensitivity an specificity by changing the cut off value (originally 500).use one value below and one value above the current value.

Use these findings are general to any infection/disease, not just measles. Discuss the implications of these findings for the development of new tests.

Any help greatly appreciated!!!